Compilare: main.cpp: In function 'int f()': main.cpp:17:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(i=1;i<=n;i++) ^~~ main.cpp:20:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' for(j=1;j<=n;j++) ^~~ main.cpp: In function 'int main()': main.cpp:60:9: warning: unused variable 'nr' [-Wunused-variable] int nr,t,niv,rez,i,j; ^~ main.cpp:60:14: warning: unused variable 'niv' [-Wunused-variable] int nr,t,niv,rez,i,j; ^~~